Sam, the infamously undisciplined Black and Tans (and the Auxiliary Division) are remembered throughout the entire island but moreso in the south where they were inflicted on the population from 1920 to 1922.
Their stock in trade was arbitrary reprisals against the civilian population for attacks on British forces and the police, most notably the sacking of the city of Cork in December 1920, an attack that left much of the city centre destroyed. Tuam, Trim, Balbriggan, Templemore and Thurles were similarly destroyed.
Of course there were also kidnappings, beating and torture of prisoners, burning of houses, crops and stocks of animal fodder, shooting of farm animals, burning of industrial dairy plants and constant harassment of civilians. Some individuals were kidnapped and killed -- a priest and the Lord Mayor of Cork being significant examples.
The government sanctioned the reprisals, but their commander, General Frank Crozier, resigned in 1921 because they had been "used to murder, rob, loot, and burn up the innocent because they could not catch the few guilty on the run".
The force was dreamed up by Winston Churchill who considered the measures against insurgency both right and necessary to maintain British grip on an island conquered and then colonised (with settlements - 'plantations' - and settlers and muskets to protect them) over the course of the previous few hundred years.
As Sam points out, the force was shipped to Palestine after calling it quits in Ireland, with a few lessons learned.
The 'Tans' and the Auxiliaries bore many similarities to the freikorps that roamed Germany during the same time period beating up commies.
Israel isn't making it all up as it goes along, and neither is Hamas.
There is plenty of precedent for the approach being taken. Whether it will be successful or not remains to be seen. In the current case, Hamas finds itself isolated from states that would normally support it against Israel, and its efforts appear to be doomed for the time being. The states that would normally support it are preoccupied with the threat posed by ISIS and not inclined to support the extremism of ISIS fellow travellers Hamas as a result.
So what they are doing is essentially choosing suicide/martyrdom in hopes that one day they will be part of the 'whataboutery' that makes their world go round..